Odyssey Marine Exploration's three largest insider shareholders as of September 29, 2026 are Gallardo Juan Antonio Carlos Cortina (TenPercentOwner, 3.93Mn shares), Mark B Justh (Director, 879.21K shares), Mark Gordon (Chief Executive Officer, 635.26K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Gallardo Juan Antonio Carlos Cortina | TenPercentOwner | 0 | 3,931,466 | 3,931,466 | 63.9% | 13 Aug, 2025 |
| 2 | Mark B Justh | Director | 879,207 | 0 | 879,207 | 14.3% | 02 Jun, 2026 |
| 3 | Mark Gordon | Chief Executive Officer | 635,263 | 0 | 635,263 | 10.3% | 01 Jul, 2026 |
| 4 | Todd E Siegel | Director | 166,377 | 0 | 166,377 | 2.7% | 02 Jun, 2026 |
| 5 | John D Jr Longley | President Coo | 154,480 | 0 | 154,480 | 2.5% | 01 Jul, 2026 |
| 6 | Jon D Sawyer | Director | 108,926 | 0 | 108,926 | 1.8% | 02 Jun, 2026 |
| 7 | Larissa Tiffany Pommeraud | Director | 101,970 | 0 | 101,970 | 1.7% | 02 Jun, 2026 |
| 8 | Jay Nudi | Pao/Treasurer | 97,826 | 0 | 97,826 | 1.6% | 02 May, 2022 |
| 9 | James S Pignatelli | Director | 64,348 | 0 | 64,348 | 1.0% | 18 Jan, 2023 |
| 10 | Laura Lionetti Barton | Chief Business Officer | 0 | 7,500 | 7,500 | 0.1% | 16 Jun, 2022 |
| 11 | Christopher Emlyn Jones | Chief Financial Officer | 1,997 | 0 | 1,997 | 0.0% | 17 Mar, 2022 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 30 Jun, 2026 | John D Jr Longley | President Coo | Acquired A | 4,167 | $0.00 | $0 | 154,480 | Direct |
| 30 Jun, 2026 | Mark Gordon | Chief Executive Officer | Acquired A | 4,167 | $0.00 | $0 | 636,402 | Direct |
| 30 Jun, 2026 | Mark Gordon | Chief Executive Officer | Disposed F | 1,139 | $0.85 | $969 | 635,263 | Direct |
| 30 Jun, 2026 | John D Jr Longley | President Coo | Disposed M | 4,167 | $0.00 | $0 | 20,833 | Direct |
| 30 Jun, 2026 | Mark Gordon | Chief Executive Officer | Disposed M | 4,167 | $0.00 | $0 | 20,833 | Direct |
| 01 Jun, 2026 | Larissa Tiffany Pommeraud | Director | Acquired M | 20,000 | $0.00 | $0 | 101,970 | Direct |
| 01 Jun, 2026 | Mark B Justh | Director | Acquired M | 20,000 | $0.00 | $0 | 879,207 | Direct |
| 01 Jun, 2026 | Jon D Sawyer | Director | Acquired M | 20,000 | $0.00 | $0 | 108,926 | Direct |
| 01 Jun, 2026 | Todd E Siegel | Director | Acquired M | 20,000 | $0.00 | $0 | 166,377 | Direct |
| 01 Jun, 2026 | Todd E Siegel | Director | Disposed M | 20,000 | $0.00 | $0 | 0 | Direct |
| 01 Jun, 2026 | Larissa Tiffany Pommeraud | Director | Disposed M | 20,000 | $0.00 | $0 | 0 | Direct |
| 01 Jun, 2026 | Jon D Sawyer | Director | Disposed M | 20,000 | $0.00 | $0 | 0 | Direct |
| 01 Jun, 2026 | Mark B Justh | Director | Disposed M | 20,000 | $0.00 | $0 | 0 | Direct |
| 14 May, 2026 | Larissa Tiffany Pommeraud | Director | Acquired A | 9,346 | $0.00 | $0 | 81,970 | Direct |
| 14 May, 2026 | Jon D Sawyer | Director | Acquired A | 9,346 | $0.00 | $0 | 88,926 | Direct |
| 20 Apr, 2026 | Todd E Siegel | Director | Acquired A | 31,475 | $0.00 | $0 | 146,377 | Direct |
| 20 Apr, 2026 | Larissa Tiffany Pommeraud | Director | Acquired A | 23,981 | $0.00 | $0 | 72,624 | Direct |
| 23 Mar, 2026 | Mark Gordon | Chief Executive Officer | Acquired M | 150,000 | $0.41 | $62.12K | 632,235 | Direct |
| 23 Mar, 2026 | Mark Gordon | Chief Executive Officer | Disposed M | 150,000 | $0.00 | $0 | 0 | Direct |
| 08 Mar, 2026 | Larissa Tiffany Pommeraud | Director | Acquired A | 6,803 | $0.00 | $0 | 48,643 | Direct |